A new study finds fertilized soil is a major driver of smog-forming pollution near the Salton Sea.
For decades, Southern California's war on smog has focused on strategies to reduce pollution from tailpipes and smokestacks. But one of the main drivers of lung-aggravating smog may be right underneath our feet, according to new research. About 100 miles east of San Diego, in the heart of the Colorado Desert, the Salton Sea air basin is one of the most polluted regions in the nation.
When cropland is watered, it can result in 'pulsing events,' where soil bacteria are reactivated and release large amounts of pollution. These surges in pollution typically last one or two days, which may be why state air regulators hadn't previously considered soil emissions a significant source of pollution near the Salton Sea. 'We've looked,' Faloona said, 'but we haven't looked carefully enough to capture these soils that are probably producing most of the .
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